baber/WOPTO huggingface dataset:
Patent JP-2006509759-A (JP)
Title: パレコキシブ（ｐａｒｅｃｏｘｉｂ）、バルデコキシブ（ｖａｌｄｅｃｏｘｉｂ）およびベンゾピラン誘導体のような水溶性の選択的シクロオキシゲナーゼ−２阻害剤の経皮投与
IPC: A61K31/35
Filed: 2003-11-07
Abstract: ＣＯＸ−２が仲介する疾患の局所的および／または全身的治療用の対象者の皮膚の部分への適用のための医薬組成物は、皮膚の部分に柔軟に適合する支持シート｛支持シートは、適用した場合それぞれ皮膚に対し遠位および近位である向かい合う表面を有する｝；ならびに（ａ）粘着性物質および（ｂ）選択的ＣＯＸ−２阻害薬、そのプロドラッグおよび塩から選ばれる水溶性活性物質｛活性物質は、治療上効果的な総量で、粘着性物質以外の合計してゼロから活性物質可溶化に効果的な量より少ない量の１種以上の溶媒を含むマトリックスに分散している｝を含む支持シートの近位表面上の被覆物質を含む。対象者の疼痛および／または炎症の部位の局所的治療方法は、対象者の皮膚表面に、好ましくは疼痛および／または炎症の部位の上に重なる又は隣接する位置に組成物を適用し、そして局所的治療量の活性物質の送達を可能にするのに効果的な期間、適所に組成物を置いておくことを含む。ＣＯＸ−２が仲介する疾患を有する対象者の全身的治療方法は、対象者の皮膚表面に組成物を適用し、そして治療量の活性物質の経皮送達を可能にするのに効果的な期間、適所に組成物を置いておくことを含む。
Patent JP-2006508834-A (JP)
Title: 漏れにくい筆記用具
IPC: B43K7/10
Filed: 2003-12-08
Abstract: 本発明は、インクリザーバ、筆記媒体及びペン先を有する筆記用具に関する。有利には、筆記媒体の異常な又は望ましくない漏れを阻止するに十分な程度まで筆記媒体を吸収するために、高吸収性又は高吸水性ポリマー（ＳＡＰ）を筆記用具のどの要素にも関連させるのがよい。ＳＡＰとしては、好ましくは、ＳＡＰが通常の使用中、リザーバからペン先への筆記媒体の所望の連絡又は流れを実質的に妨害しないような量で筆記用具の要素又は部品の表面に又はその付近に存在するポリマー又はコポリマーが挙げられるが、これらには限定されない。本発明の筆記用具は、筆記媒体の漏れ抵抗の増大を示すはずである。
Patent JP-2006510500-A (JP)
Title: 開放孔材料から作製された半加工製品を成形するための装置および方法
IPC: B29C51/10
Filed: 2003-11-25
Abstract: 本発明は、多数部分成形工具（１）を用いて、開放孔プラスチックから作製されたウェブ状またはシート状の半加工製品（７、８）を成形するための方法であって、互いに向かってまた互いに離れて移動可能な前記多数部分成形工具の工具部分（２、３）が、少なくとも１つの金型構造を有するキャビティ（４）を画定する方法に関する。本発明は、本質的に、開放孔材料から作製されたウェブ状またはシート状の半加工製品の少なくとも１つのセクションが、キャビティ（４）に割り当てられる弾性材料から作製されたバルーンまたはホース（１８）を膨張させることによって成形工具（１）のキャビティ内で成形されることを特徴とする。このようにして、開放孔熱可塑性材料および開放孔デュロプラスチック材料の両方を有効にかつ費用効率的に賦形できる。特に、本発明による方法により、アンダカット（２３、２４）を有する開放孔成形部分の製造が可能である。さらに、本発明は、本発明による方法を実施するための装置に関する。
Patent JP-2006512446-A (JP)
Title: チーグラー・ナッタ重合触媒とアルモキサンベースのシングルサイト重合触媒との間の移行方法
IPC: C08F2/38
Filed: 2003-11-19
Abstract: 重合触媒系の間、好ましくは互いに非適合性の触媒系の間の移行方法。特に、この方法は、チーグラー・ナッタ触媒系、メタロセン触媒系及びその他のＭＡＯベースシングルサイト触媒系を用いるオレフィン重合反応の間の移行に関する。
Patent JP-2006513028-A (JP)
Title: 高圧洗浄用のスプレーノズル
IPC: B05B1/34
Filed: 2003-12-18
Abstract: 一例として示した実施形態における、プラスチックの液体絞りおよび安定用インサートによって部分的に画成される長手方向に延びた液体流動通路を有する細長いノズルボディを有する高圧液体スプレーノズルに関する。インサートは、上流エントリ部、小径下流アプローチ部、及び上流部と下流部との間にある内側向きに細まるスロート部とを含む液体流通路を有する。上流通路部は、複数の長手方向に延びる縦溝を画成する波形の断面形状を有する。この縦溝は、ノズルを介して吹き付けられる高圧液体流における乱れを安定化させ最小化するのに適しているので、より集中した連続の液体流が、より高速でより大きな対洗浄面衝撃力でノズルから噴射され、洗浄が向上する。
Patent JP-2006190528-A (JP)
Title: Nonaqueous electrolyte battery and positive electrode thereof
Inventor: FUJII AKIHIRO
IPC: H01M4/131
Filed: 2005-01-05
Abstract: <P>PROBLEM TO BE SOLVED: To improve charge-discharge cycle performance of a nonaqueous electrolyte battery equipped with a positive electrode containing phosphoric acid iron compound Li<SB>X</SB>FePO<SB>4</SB>(0≤x≤1).  <P>SOLUTION: The positive electrode includes mixture of phosphoric acid iron compound of bivalent iron and phosphoric acid iron compound of trivalent iron, for example Li<SB>3</SB>Fe<SB>2</SB>(PO<SB>4</SB>)<SB>3</SB>and trigonal FePO<SB>4</SB>. With this configuration, a negative electrode is made to cause charging reserve. The presence of the charging reserve allows absorption of deviation in charging/discharging potential region caused by capacitance balance between positive/negative electrode due to charging/discharging cycle, for improved charging/discharging cycle performance of the nonaqueous electrolyte battery. The battery is preferred to be coupled with a negative electrode which uses lithium titanate.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006197755-A (JP)
Title: Multiple-output dc-dc converter
Inventor: USUI HIROSHI
IPC: H02M3/28
Filed: 2005-01-14
Abstract: <P>PROBLEM TO BE SOLVED: To realize a multiple-output DC-DC converter with which multiple direct-current outputs can be obtained stably over a range from no-load to all loads.  <P>SOLUTION: In the multiple-output DC-DC converter, the primary winding (5a) of a transformer (5) is placed between the first secondary winding (5b) and the second secondary winding (5c). Therefore, the first secondary winding (5b) and the second secondary winding (5c) are electromagnetically loosely coupled with each other. This reduces the surge voltage induced in the first secondary winding (5b) of the transformer (5) from the second secondary winding (5c) when MOS-FET (20) for controlling secondary output is turned off under light load or without load. Therefore, restrictions are eased on power transmission from the primary side to the secondary side of the transformer (5) due to feedback control in a primary control circuit (14). For this reason, it is possible to suppress fluctuation in the output voltage V<SB>O2</SB>of a second rectifying and smoothing circuit (17) due to the above surge voltage. As a result, multiple direct-current outputs V<SB>O1</SB>and V<SB>O2</SB>can be obtained stably over a range from no load to all loads.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006195288-A (JP)
Title: Optical writing device and image forming apparatus
Inventor: SAKAGAMI YOSHINOBU
IPC: G02B26/12
Filed: 2005-01-14
Abstract: <P>PROBLEM TO BE SOLVED: To provide an optical writing device whose noise prevention and heat discharge are compatible when a rotary polygon mirror is installed.  <P>SOLUTION: The optical writing device 8 which deflects a light beam from a light source by the rotary polygon mirror 142 to perform a scan is equipped with: a rotary polygon mirror surrounding portion 200 which can rotatably support the rotary polygon mirror 142 and is composed of a partially open space 201; and a duct portion 210 which is attachable to and detachable from the open portion 201 of the rotary polygon mirror surrounding portion 200 and has an opening portion 210A communicating at the time of loading. The open portion 201 on the side of the rotary polygon mirror surrounding portion 200 and the opening portion 210A on the side of the duct 210 are made continuous via a shield member 211 shielding their communication portions from the outside.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2005206147-A (JP)
Title: Display for vehicle speed control function and method to display vehicle speed control function
Inventor: DILLMAN MARTIN
IPC: B60R16/02
Filed: 2005-01-19
Abstract: <P>PROBLEM TO BE SOLVED: To provide a display to precisely inform a driver of a state of each of speed control functions for constant speed travelling, downhill travelling and following travelling.  <P>SOLUTION: This display 1 contains display fields 1A, 1B, 1C to respectively display states of the cruise control function, the downhill speed control function and the adoptive cruise control function, and these display fields 1A, 1B, 1C contain icons 2A, 2B, 2C peculiar to their respective control functions and numeric values 3A, 3B, 3C corresponding to speed limits for the respective control functions and a set value of time interval to a front vehicle. Additionally, there are favorably symbols 4A, 4B, 4C to show which of the functions works, and consequently, the driver can grasp the general aspect of the speed control functions of this vehicle.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2006199480-A (JP)
Title: Method for working perforation for vertical division and cutoff in bound book of saddle stitch specification
Inventor: KANO HIDETO
IPC: B42C19/02
Filed: 2005-01-24
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for working perforation for vertical division and cutoff in a bound book of saddle stitch specification capable of working perforation for cutoff by a working step (in-line) by a printing/folding machine.  <P>SOLUTION: In the method for working perforation for cutoff to provide perforation 6 for cutoff to vertically divide a bound book 5 of saddle stitch in the bound book 5 of saddle stitch to be constituted by performing overlapping saddle stitch of a signature 4 formed by folding one print paper 1 along folding lines, the perforation 6 for cutoff is formed by determining the position of a perforation hole 7A closest to a final folding line K out of perforation holes 7 to constitute perforation 6 for cutoff with the final folding line K as reference in a print paper 1A in a step before the final folding of the print paper 1, and continuously forming the perforation holes 7 across the final folding line K in the direction orthogonal to the final folding line K.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006210034-A (JP)
Title: Heating cooker
Inventor: FUKUNAGA EIJI
IPC: F24C7/02
Filed: 2005-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a heating cooker combining induction heating and high-frequency heating where cooking work performance, such as stirring of the food in the container and addition of seasoning during cooking is improved, and each of heating cooking is carried out satisfactorily.  <P>SOLUTION: The front opening of a cooking chamber 3 is formed in slanted form, and the lateral width is made larger than the inner depth. As a result, a container 90, such as a both-hand pan, can be contained with a margin in the chamber and the status of the food in the container 90 can be confirmed easily, and the work of stirring or the like can be facilitated. Furthermore, by arranging an induction heating unit 20 at the lower part of the bottom face part 3b of the cooking chamber, the container 90 mounted on a tray 7 is efficiently subjected to induction heating, and by irradiating microwave in the cooking chamber 3 through a through hole 32a punched and provided on the upper wall of a microwave diffusion chamber 33 provided at the top plate part 3a, microwave is fully spread on the food contained in the container 90 of a deep bottom, and high-frequency heating is also carried out properly.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006210522-A (JP)
Title: Semiconductor device and its manufacturing method
Inventor: NAGANO MAKOTO
IPC: H01L29/417
Filed: 2005-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor device wherein adjacent gate electrodes can be arranged in a narrow pitch and microfabrication on the surface of a silicon substrate can be improved by embedding, and also to provide its manufacturing method.  <P>SOLUTION: The semiconductor device comprises the gate electrodes of adjacent transistors which are formed on the silicon semiconductor substrate 1; an embedded metal layer 7 which is embedded between the transistors, with one end of each of the gate electrodes 9 and 10 so arranged as to overlap the end face of the metal layer via a gate insulation film 8; and LDD regions 16 and 17 formed on the other end side of each gate electrode.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006210533-A (JP)
Title: Multilayer printed board and its manufacturing method
Inventor: MIYATA KEITARO
IPC: H05K3/46
Filed: 2005-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To make a multilayer printed board light-weight multilayered one by making an insulation resin layer thin without causing the deformation by interlayer connection conductors, and increase the interlayer connection reliability by a simple structure in the multilayer printed board and its manufacturing method.  <P>SOLUTION: The multilayer printed board 1 is made by stacking a plurality of resin sheets 3 which are formed of thermoplastic resin and are each formed with a conductor pattern 2 consisting of a metal foil on one surface, and has, in via holes 4 formed in the resin sheets 3, the interlayer connection conductors 5 for electrically connecting the conductor patterns 2 belonging to the individual resin sheets 3 which are stacked adjacently to each other. The thickness (d) of the resin sheets 3 constituting the multilayer printed board 1 is 200 μm or less, and the interlayer connection conductors 5 each contain a metal different from the metal foil which constitutes the conductor patterns 2 by 50 wt.% or above of the interlayer connection conductor 5. At least part of the metal different from the metal foil forms an alloy with the metal which constitutes the metal foil.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006210081-A (JP)
Title: Micro relay
Inventor: KISHIMOTO SHINICHI
IPC: H01H50/56
Filed: 2005-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a micro relay in which even if the difference of thickness dimension of a pair of fixed contacts is comparatively large, a movable contact can be contacted to both fixed contacts, and the movable contact hardly comes off from both fixed contacts.  <P>SOLUTION: The armature 30 is housed in a case A capable of seesaw action with the intermediate part in a longitudinal direction as a fulcrum. A contact base board 34 having a movable contact provided in a longitudinal direction of the armature 30 is provided in parallel at the armature 30, and the armature 30 and the contact base board 34 are connected through a contact pressure spring 35 having elasticity in thickness direction of the armature 30. A pair of fixed contacts 14 are provided at a portion where the movable contact contacts and is separated at the inner periphery face of the case A, and the movable contact short-circuits between both fixed contacts in a form straddling both fixed contacts. The contact pressure spring 35 is connected to the armature 30 at a position separated from the fulcrum of seesaw action of the armature 30 farther than the contact base board 34 in the longitudinal direction of the armature 30.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006211216-A (JP)
Title: Drive method of solid imaging device, and imaging apparatus and system using the same
Inventor: ARIGA YUICHI
IPC: H04N5/347
Filed: 2005-01-27
Abstract: <P>PROBLEM TO BE SOLVED: To realize a high-speed electronic shutter producing no image distortion caused by a time required for readout scanning without adding a circuit required for integrated electronic shutter operation.  <P>SOLUTION: In an imaging device having a single storage for two photodetectors, the exposure amount of optical charges transferable from the photodetectors to the storage in a first time transfer is controlled by the electronic shutter. Also, the exposure amount of the optical charges in the photodetectors which cannot be transferred in the above first time is controlled by means of a mechanical shutter. Based on the above exposure amount of the electronic shutter, the exposure amount of the mechanical shutter is corrected.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006208220-A (JP)
Title: Insulating support
Inventor: OKA HIDETOSHI
IPC: C04B37/02
Filed: 2005-01-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide an insulating support further firmly fixable to a ceramic member with a screw without breaking the ceramic member even when it is firmly screwed to the ceramic member.  <P>SOLUTION: The insulating support comprises a ceramics-made insulating column 1 of which both end surfaces have a metallized layer, metal conjugation members 3 that are soldered with both end surfaces of the insulating column 1 and have a flat screw receiving section 3a projected to the other end surfaces on the opposite side to the soldering surface, and electrode members 2 that have a through hole 2a for screw insertion that penetrates between both main surfaces and into which the screw receiving section 3a is inserted and are fixed to the metal conjugation members 3 via screws 4 so that one main surface is butted on the other end surface of each metal conjugation member 3.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2005221497-A (JP)
Title: Display method and system of navigation system
Inventor: MOONG W HAN
IPC: G08G1/0969
Filed: 2005-01-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide the display method and system of a navigation system for searching and displaying population of objects.  <P>SOLUTION: This display method is to provide data search for detecting relative density of such objects as POI (Point of Interest) in a designated area and then display the search result. First magnitude and geometry of a search template 109 are specified, displacement of the position only by predefined increment is made to scan the search template on the search area 100, number of objects 103 on the search area 100 within the search template is counted and recorded for each increment of displacement position to prepare distribution matrix of the objects, distribution of the population of the objects is detected from this object distribution matrix, and then the population of the objects is displayed on the search area.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2006125617-A (JP)
Title: Vibration damper
Inventor: OTSUBO YOSHITAKA
IPC: B60K5/12
Filed: 2005-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To effectively attenuate and absorb a primary vibration input along the axial direction of a device while restraining increase in size of the device, and effectively attenuate and absorb a secondary vibration input along the direction substantially orthogonal to the primary vibration.  <P>SOLUTION: In this vibration damper 10, two second pressure receiving liquid chambers 102A, 102B are disposed between an outer tube 24 and a mounting metal bar 26 and allowed to communicate with an auxiliary liquid chamber 72through two second orifices 108A, 108B. Accordingly, when the secondary vibration along the direction of a secondary amplitude orthogonal to the axial direction is input from an engine side, a rubber elastic body 22 is elastically deformed along the direction of the secondary amplitude, the internal volumes of the second pressure receiving liquid chambers are increased and reduced, and a liquid communicates between the second pressure receiving liquid chambers and the auxiliary liquid chamber. In this case, since a resonance occurs in the liquid communicating between the second pressure receiving liquid chambers and the auxiliary liquid chamber through the second orifices in synchronism with the input secondary vibration, particularly a low frequency vibration input along the direction of the secondary amplitude can be effectively absorbed.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006206534-A (JP)
Title: Method for removing ammonia from solution containing ammonium salt
Inventor: KOIZUMI YOSHIYUKI
IPC: B01D3/00
Filed: 2005-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for efficiently liberating and removing ammonia from a solution containing an ammonium salt to a low concentration.  <P>SOLUTION: The method is carried out as follows. The solution containing the ammonium salt is fed to the upper part of a stripping tower so as to provide a residence time of the solution in the stripping section of the stripping tower within the range of about 10-120 s in the method for liberating and removing the ammonia from the solution containing the ammonium salt, e.g. a hydrolyzed solution prepared by hydrolyzing 5-(β-methylmercaptoethyl)hydantoin in the presence of potassium carbonate and containing the ammonium salt. Steam is fed to the vapor-phase section in the lower part of the stripping tower to carry out steam stripping of the ammonia. The method is performed by feeding the hydrolyzed solution containing the ammonium salt to the upper part of the stripping tower and steam is fed into the bottom of the stripping tower to carry out the steam stripping of the ammonia.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006207080-A (JP)
Title: Core-sheath conjugated fiber
Inventor: SAWAI TSUNESUKE
IPC: D01F8/04
Filed: 2005-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To impart a dry unique touch feeling to a synthetic fiber by randomly arranging sharp unevennesses on the fiber surface.  <P>SOLUTION: The synthetic fiber is spun into a core-sheath structure of an axial core layer 14 and sheath layers (15 and 16) by a core component polymer and a sheath component polymer. Granules 12 are incorporated into the sheath component polymer and the outer surface 11 of the sheath layer is pushed out with the granules 12 to form raised protrusions 13. The sheath layer is preferably a double structure of an outer sheath layer 16 and an inner sheath layer 15. The granules 12 are preferably incorporated into the sheath component of the inner sheath layer 15. The area ratio of the cross-sectional area A of the axial core layer 14 composed of the core component, the cross-sectional area B of the inner sheath layer 15 and the cross-sectional area C of the outer sheath layer 16 is preferably set at (50-90)(A):(10-40)(B):≤10 (C).  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2006212084-A (JP)
Title: Connector
Inventor: IMAI MASAOMI
IPC: A61M39/02
Filed: 2005-02-01
Abstract: <P>PROBLEM TO BE SOLVED: To provide a connector of a simple structure for easily and safely performing the operation of injecting liquid.  <P>SOLUTION: The connector 1 is connected to a liquid container. The connector 1 comprises: a connector body 9 provided with a first flow path 7 and a second flow path 8 provided inside and independent of each other and a needle body 91 which one end of them is respectively opened to an end face 911 and which is connected to the liquid container; a first connector part 2A provided on the other end part of the first flow path 7 and forming a cylindrical shape; a second connector part 2B provided on the other end part of the second flow path 8 and forming the cylindrical shape; and a valve body 5 provided on at least one of the first connector part 2A and the second connector part 2B to be opened/closed on attachment/detachment of a tube body to/from the connector part.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2005353035-A (JP)
Title: Data migration in storage system
Inventor: MATSUNAMI NAOTO
IPC: G06F13/10
Filed: 2005-02-03
Abstract: <P>PROBLEM TO BE SOLVED: To succeed information for data access from a migration source to a migration destination at the time of data migration.  <P>SOLUTION: The storage system is connected to a name server managing correspondence between initiator and target, and includes a first storage node and a second storage node. A first logic unit with a first target set therein is present in the first storage node, and a second logic unit is present in the second storage node. When data are migrated from the first logic unit to the second logic unit, the first storage node transmits not only data stored in the first logic unit but also information for the first target to the second storage node. The second storage node sets a target in the second logic unit by use of the received information for the first target.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2005142170-A (JP)
Title: Metal halide discharge lamp, metal halide discharge lamp lighting device and luminaire
Inventor: ISHIGAMI TOSHIHIKO
IPC: F21Y101/00
Filed: 2005-02-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a metal halide discharge lamp with electrical property and luminous property almost equivalent to those of a metal halide discharge lamp in which mercury is enclosed, a metal halide discharge lamp lighting device and a luminaire.  <P>SOLUTION: This metal halide discharge lamp includes a fire-resisting and transparent air-tight container 1; a pair of electrodes 2 sealed in the air-tight container; and a discharge medium containing a first halide, a second halide and noble gas and sealed in the air-tight container, wherein the first halide is a metal halide mainly emitting light as a lamp and the second halide is a plurality of kinds of metal halides having high vapor pressure and mainly determining a lamp voltage. Mercury is not essentially sealed in the metal halide lamp.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005264717-A (JP)
Title: Ground freezing method
Inventor: YOSHIDA TERU
IPC: E21D9/06
Filed: 2005-02-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a ground freezing method for preventing the occurrence of frost heaving or excessive freezing expansion pressure while reducing a period for forming a frozen ground.  <P>SOLUTION: When joining a shield tunnel, water stop devices 3, 4 provided on shielding machines 1, 2 are used for freezing a surrounding natural ground in a joint area to form the frozen ground. When forming the frozen ground, brine of an extremely low temperature, for example, -80°C is distributed to pasted freezing pipes 31, 41 for freezing the natural ground to form the frozen ground having a required thickness in a short period. After forming the frozen ground having the required thickness, the brine of a gently low temperature, for example, -10°C is distributed into the pasted freezing pipes 31, 41 to keep the frozen ground at a required thickness while preventing the thawing of the frozen ground.  <P>COPYRIGHT: (C)2005,JPO&NCIPI